US4213641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament wound pipe coupling
Assignee: Owens Corning
•
Filing: 1977-12-29
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Granted: 1980-07-22
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Expires: 1997-12-29
Abstract
Abstract The pipe coupling includes a hollow cylindrical body and pipe registering means projecting radially inward therefrom centrally thereof. The body has a pair of inner annular grooves respectively adjacent opposite ends for the reception of sealing rings. Both the body and the pipe registering means are formed of glass fiber reinforced thermosetting resin and each contains glass filament windings. A plastic film strip between the body and the pipe registering means maintains them separate as the resin of both is cured. Thereafter, any cracking of the pipe registering means will leave the body intact and a good pipe joint will be maintained.
Inventors
- 👤 Joe B. Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:28
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/80; B29C53/82; B29C53/821; B29C53/824; B29C53/56; B29C53/58; B29C53/583; B29C53/585; F; F16; F16L; F16L47/00; F16L47/06; F16L47/08; B29L; B29L2031/00; B29L2031/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A pipe coupling comprising a generally cylindrical, hollow, glass fiber reinforced thermosetting resin body and a glass fiber reinforced thermosetting resin pipe registering means projecting radially inwardly from the body substantially midway between opposite end faces thereof, the body and the pipe registering means each containing glass filament windings, the body having a pair of inner annular grooves respectively adjacent the opposite end faces for the reception of sealing rings, the body having been formed around the pipe registering means immediately after the forming of the pipe registering means and cured simultaneously therewith, and the pipe registering means being separate from but substantially contiguous with the body.
Claim 2
Dependent Claim
107 words
A pipe coupling comprising a generally cylindrical, hollow, glass fiber reinforced thermosetting resin body and a glass fiber reinforced thermosetting resin pipe registering means projecting radially inwardly from the body substantially midway between opposite end faces thereof, the body and the pipe registering means each containing glass filament windings, the body having a pair of inner annular grooves respectively adjacent the opposite end faces for the reception of sealing rings, the body having been formed around the pipe registering means immediately after the forming of the pipe registering means and cured simultaneously therewith, and the pipe registering means being separate from but substantially contiguous with the body.
Claim 3
Dependent Claim
40 words
A pipe coupling as claimed in claim 1 including a plastic film strip disposed between the pipe registering means and the body for maintaining the pipe registering means separate from the body as the thermosetting resin of both is cured.
Claim 4
Dependent Claim
20 words
A pipe coupling as claimed in claim 1 including a surfacing mat within the body adjacent an inner surface thereof.
Claim 5
Dependent Claim
20 words
A pipe coupling as claimed in claim 3 including a non-woven mat within the body and surrounding the surfacing mat.
Claim 6
Dependent Claim
33 words
A pipe coupling as claimed in claim 4 including a mat of woven glass roving adjacent the midpoint of the wall thickness of the body and extending substantially the length of the body.
References Cited (Backward Citations)
US2751237A
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US2878038A
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FR1207150A
Cited
US3179445A
Cited
US3575445A
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US3623930A
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US3765979A
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GB1320685A
Cited
GB1365151A
Cited
US4106797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-22 | 1984-01-21 | 1984-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-22 | 1988-01-21 | 1988-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-22 | 1992-01-21 | 1992-07-22 | $7700.00 | Window Closed / Lapsed |